Stopwatch, Type A-8, Navigation Watch for Ground Speed 1942 "Jitterbug" w Box BT-12 and the Degrees Steering indicates

and the Degrees Steering indicates the direction toward the target from the current course of the aircraft

The 7-component Flux Gate Compass system was designed to provide accurate navigational guidance using the earth's magnetic forces by minimizing interference from the systems of the aircraft

Plane Facts was published by the USAAF Air Service Command to communicate the latest information on servicing

but it is an exceptional artifact from WWII

Stopwatch, Type A-8, Navigation Watch for Ground Speed 1942 "Jitterbug" w Box BT-12 and the Degrees Steering indicatesHere is an authentic WWII era aircraft navigator's Watch, Navigation (Ground Speed) Stopwatch, Type A 8, made by Elgin to Air Corps US Army spec #94 27749. With a serial # AC42 7094, indicating manufacturing year of 1942. Type A 8 stopwatches were used in any WWII aircraft with a navigator, such as heavy (B 17, B 24, B 29) and medium bombers (B 25, B 26) and large transports (C 46, C 47, C 54). The outer ring of the dial counts up to 10 seconds and